Electric plug with ground indicating light
United States Patent 3171113
US Patent References:
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- - 1515891

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- - 2303056

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- - 2484558

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Inventors:
Mcnamara, James K.
Publication Date:
02/23/1965
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Assignee:
Mcnamara, James K.
Primary Class:
340/649
Other Classes:
439/166, 439/108, 324/133, 439/103, 200/51R, 439/106, 439/490
International Classes:
H01R13/648
US Patent References:
2997701Plug-in cap with ground indicating light
Foreign References:
DE496966C